Jackie

Jackie needed more food to support his now-large tribe. He began teaching the Apes how to plant trees and other plants, as well as how to irrigate them, making it easier to grow things in the desert, he also guided them in the creation of tools to help them do this. Finally he created a kind of plant that was edible and nutritious, but could grow in areas of little water in great numbers, thus making them adaptable to the desert. They would need more water than the average desert plant, but he dotted the lands around the desert with abundant oasis' so that they could grow them in more places. He then taught them how to plant farm and cultivate the plant he called the "Sands Bounty" or Desinai.

(would that be a major or minor act for those?)